Following are a number of back-translations as well as a sample translation for translators of Joel 3:17:

• Kupsabiny: “God is saying,
  ‘You will know that I God sits on Zion,
  that holy mountain of mine.
  Jerusalem shall be cleansed forever
  so that never again will raiding enemies pass by there.” (Source: Kupsabiny Back Translation)
• Newari: “”Then you will know that I am the LORD your God
  who lives in Zion, my Holy Mountain.
  Jerusalem will be holy,
  and never again will foreigners attack Jerusalem.” (Source: Newari Back Translation)
• Hiligaynon: “Ones-who-come-from-Juda, you (plur.) will-know that I, the LORD your (plur.) God, live in Zion, my holy mountain/hill. And once-more Jerusalem will-become holy; this will- no-longer -be-attacked again by the-(ones) from-other nations.” (Source: Hiligaynon Back Translation)
• Kankanaey: “‘My future-judging of them, that will be the means-of-knowing of you Israelita that I am Yahweh your God who stays in Zion my holy mountain. Zion will become a holy city in Israel and other nations will absolutely not again defeat-it.” (Source: Kankanaey Back Translation)
• English: “Yahweh says, ‘At that time, you Israeli people will know that I am Yahweh, your God.
  I live on Zion, my sacred hill.
  Jerusalem will be a sacred city,
  and soldiers from other countries will never conquer it again.” (Source: Translation for Translators)